Manhattan remembers.

A view of flowers and pictures left along the North Pool at the 9/11 Memorial in New York, during a ceremony marking the 12th anniversary of the 9/11 terrorist attacks.

A view of flowers and pictures left along the North Pool at the 9/11 Memorial in New York, during a ceremony marking the 12th anniversary of the 9/11 terrorist attacks. (JUSTIN LANE / AFP/Getty Images)

A view of flowers and pictures left along the North Pool at the 9/11 Memorial in New York, during a ceremony marking the 12th anniversary of the 9/11 terrorist attacks.JUSTIN LANE / AFP/Getty Images